Before the advent of NVG’s (night vision goggles) and IR glint tape/strobes- Ranger eyes were used to identify who is a friend, and who is a foe.
This low-tech option is great as an identifier since most don’t have NVG’s. Great to identify you gear or bag in a dark room when you may need to bail out on a hurry. Or when your buddy is following you through the bush during low-light operations.
BSS Ranger Eye Patch .75” x .75” PVC with GITD (glow-in-the-dark) BSS Crest